toolchain-layer: initial add

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
Acked-by: Eric Bénard <eric@eukrea.com>

toolchain-layer/conf/layer.conf

@@ -0,0 +1,25 @@
+# It really depends on order of the layers appearing in BBLAYERS
+# variable in toplevel bblayers.conf file, where bitbake will search
+# for .inc files and others where bitbake uses BBPATH since it will
+# search the directories from first to last as specified in BBPATH
+# Therefore if you want a given layer to be considered high priority
+# for the .inc and .conf etc. then consider it adding at the beginning
+# of BBPATH. For bblayers bitbake will use BBFILES_PRIORITY to resolve
+# the recipe contention so the order of directories in BBFILES does 
+# not matter.
+
+# We have a conf directory, append to BBPATH
+BBPATH .= ":${LAYERDIR}"
+
+# We have a recipes directory, add to BBFILES
+BBFILES += "${LAYERDIR}/recipes-*/*/*.bb ${LAYERDIR}/recipes-*/*/*.bbappend"
+
+BBFILE_COLLECTIONS += "toolchain-layer"
+BBFILE_PATTERN_toolchain-layer := "^${LAYERDIR}/"
+
+# Define the priority for recipes (.bb files) from this layer,
+# choosing carefully how this layer interacts with all of the
+# other layers.
+
+BBFILE_PRIORITY_toolchain-layer = "6"
+